Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Reexamination Certificate
1997-12-15
2001-08-07
Watson, Robert C. (Department: 3723)
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
Reexamination Certificate
active
06269528
ABSTRACT:
BACKGROUND OF INVENTION
1. Field of the Invention
The present invention relates to a tool for removing a nut from a nut plate assembly.
2. Description of the Prior Art
Plate nut assemblies, of the type shown in U.S. Pat. No. 5,137,406, include nuts that are replaceable. Currently, special tools are necessary to remove the nuts from their cages. Small nut plates with thin-walled cages require a tool which can reach inside the assembly, pry open the cage and force the nut out. Larger nut plate assemblies with thick-walled cages require greater prying force, thus necessitating a stronger, thicker tool. However, thicker tools cannot fit inside the nut plate assembly. In addition, the prior art requires a separate tool for installing nuts in the cage portion of the nut assembly, thus in turn increasing the cost of the maintaining and servicing the assembly.
What is thus desired is to provide a single tool for use with both small and large nut plate assemblies wherein the tool can remove the nut while positioned outside the nut plate assembly cage.
SUMMARY OF THE PRESENT INVENTION
The present invention provides a single tool which has the capability of removing the nut from both large and small nut plate assemblies.
The tool comprises a handle having a nose portion at one end, the nose portion comprising an upper jaw portion separated from a lower jaw portion by an opening. The upper jaw portion is used to pry open the nut plate cage and the lower jaw portion pushes and lifts the nut from the cage. The space between the two jaw portions enables a pivoting action around the pried open cage wall.
The present invention thus provides a tool for removing a nut from a nut cage assembly, the tool being relatively simple to use and inexpensive to fabricate and being capable of use for nuts of various thicknesses.
REFERENCES:
patent: 45171 (1864-01-01), Rainville
patent: 3495284 (1970-02-01), Weingardt
patent: 3713200 (1973-01-01), Burns
patent: 4999898 (1991-03-01), Schmeling
Burn Donald E.
Stafford Jay M.
Fairchild Holding Corp.
Keschner Irvine
Watson Robert C.
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